通过金属硝酸盐溶液浸渍离子交换并结合焙烧的方式，制备负载 Ag+改性13 X 分子筛，并考查其在燃油吸附脱硫中的应用。比较负载不同金属离子改性13X分子筛对模拟燃油中噻吩的吸附脱除能力，确定了对13 X分子筛吸附脱硫能力影响依序为 Ag+>Ni2+>Zn2+>Fe3+，结果符合软硬酸碱理论。分析了焙烧条件对载银改性分子筛吸附脱硫能力的影响，确定最优焙烧温度450℃、焙烧时间6h。对 Ag(Ⅰ)-13 X进行 SEM、XRD、BET 等表征，结果表明改性过程没有明显改变分子筛原本的多孔结构。通过对比13X分子筛改性前后对模拟汽油的填充床吸附实验，表明载银改性后，分子筛吸附剂的脱硫能力得到显著提高。
Ag+-modified 13X zeolites were prepared by calcinations and metallic ion exchange in nitrate solution and used for adsorptive desulfurization of fuel.Different metallic ion effect the desulfurization capacity by the order of Ag+>Ni2+>Zn2+>Fe3+,it also conform to hard-soft acid-base theory.Calcinations influence the modification through temperature and time,and the optimal conditions are 450℃ and 6h,respectively.SEM, XRD and BET characterization indicate the modification did not change the framework of porous solid materials. Fix-bed experiments were carried out with thiophene dissolved in n-heptane as model gasoline,and the results illustrate the Ag+-modified 13X zeolites have higher desulfurization capacity than 13X.
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